09-01-2019, 01:58 AM
While mine isnt a heavy barrel, it does seem to like IMR 3031 pushing 123 SST or 120 Pro Hunter bullets. Hopefully tomorrow I can see what the Magnetospeed says they are doing. Last time I checked a load with a 100gr TTSX and the range of what Barnes lists for that bullet with RL-15 I was disappointed. Using their max load I hit a whopping 2550 FPS. Groups sucked as well. 100/120 NBT seem to group okayish from my rifle, but nothing to write home about. The 123 SST and 120 PH at least hold sub 1" C-C for a three shot group at what looks to be about my max for this rifle, even though Quick Load has me at right around 47K PSI. Velocity figures will help a lot with sorting the QL data out.